*{
    margin: 0;
    padding: 0;
}

@keyframes bgChange {

    0%{opacity: 70%;}

                 
    25%{opacity: 80%;}

   
    50%{opacity: 90%;}

    

    75%{opacity: 80%;}

 

    100%{opacity: 70%;}

  }

  html{
      min-width: 1200px;
  }

body{
    background-image: url("../image/0.jpg");
    background-repeat: no-repeat;
    width: 100%;
    height: 100%;
     overflow: hidden;
    background-size: cover;
    background-position: center 15%; 
    animation:bgChange 5s;
    animation-iteration-count:infinite;
    animation-direction:alternate;
    animation-timing-function: ease-in-out;
}

.from{
    z-index: 1;
    position: absolute;
    width: 400px;
    top: 200px;
    left: 35%;
    box-sizing:border-box;
    text-align: center;
}

.from:hover{
    box-shadow: 0px 0px  5px 2px #888888 ;
}

.input{
    border-radius: 30px;
    height: 100%;
   padding: 10px 10px 10px 10px;
     border: 1px solid #ccc;
}

.input:hover{
    border: 1px solid rgb(104, 68, 145);
}

.container{
    border: 1px solid #7aaac5;
    margin: auto;
    text-align: center;
    padding-bottom: 20px;
    padding-top: 20px;
    background-color: rgb(239, 233, 247);
}

.center{
  
    margin-top: 20px;
    text-align: center;
}

.label{
    margin-right: 20px;
    display: inline-block;
}

.button{
    width: 200px;
    border-radius: 30px;
    border: 1px solid #c5611f;
    padding: 5px 5px 5px 5px ;
    background-color: #c5611f;
    color: #ccc;
    font-weight: 800;
}

.button:hover{
    background-color:#f30a0a;
}

#introduction{
    padding: 20px;
    margin-bottom: 20px;
}

.nav{
    flex: 4;
    margin-top: 10px;
}

a{
    text-decoration: none;
    color: black;
}

.header{    
    box-sizing: border-box;
    padding-top: 20px;
    height: 120px;
    width: 100%;
    position: fixed;
    display: flex;
    z-index: 100;
    background-color: white;
    

}

.title{
    box-sizing:border-box;
    font-weight: 800;
    font-size: 20px;
    flex: 1;
    display: flex;
    align-items: center;
  

}

.nav > li {
    float: left;
    text-align: center;
    list-style: none;
    padding-left: 20px;
    padding-right: 20px;
    height: 100%;
   
}

.nav > li:hover {
    background-color: ghostwhite;
    cursor: pointer;
    
}

.nav > li > a{
    color:rgb(175, 146, 146);
    font-weight: 500;
    font-size: 14px;
    height: 100%;
    width: 100%;
    display: inline-block;
    line-height: 80px;
   
}

.nav > li > a:hover{
    color: #000000;
}

.logo{
    width: 120px;
    height: 100px;
}

.content{
    display: none;
}

.search{
    width: 80px;
    border-radius: 30px;
    padding: 5px;
    background-color: rgb(69, 69, 212);
    color: white;
    border: 1px solid blue;
}

.delete{
    width: 80px;
    border-radius: 30px;
    padding: 5px;
    background-color: red;
    color: white;
    border: 1px solid red;
}

.select{
    margin-top: 20px;
    padding: 10px;
    border-radius: 30px;
    color: darkcyan;
    width: 40%;
    margin-bottom: 20px;
}

.celi{

    display: flex;

    flex-direction: row;

   justify-content: space-between;

   height: 50px;

   align-items: center;

   border-bottom: 1px solid rgb(60, 81, 175);

   padding-left: 30px;

   padding-right: 50px;

    
 }

 .vertical-box{
    margin-top: 20px;
    margin-bottom: 20px;
 }